The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2012
Filed:
Dec. 27, 2010
Eoin Ohannaidh, Laval, FR;
Eoin Ohannaidh, Laval, FR;
STMicroelectronics SA, Montrouge, FR;
Abstract
The invention concerns a biasing circuit for controlling the current flowing through a differential pair () comprising: a first branch comprising a first resistor (), a first transistor device () and a second transistor device () coupled in series; a second branch comprising a second resistor (), a third transistor device () and a fourth transistor device () coupled in series, a control node of the third transistor device being coupled to a first node () between the first resistor and the first transistor device, and a control node of the first transistor device being coupled to a second node () between the second resistor and the third transistor device; and an operational amplifier () having an output node coupled to control nodes of the second and fourth transistor devices, said output node providing a output signal (Vc) for controlling the current flowing through said differential pair.